5. Sandy, glauconitic clays with gypsum; oyster-bed at base in places. _Alectryonia Clot-Beyi_, Bellardi, _Exogyra Fraasi_, May.-Eym. 10 _2nd escarpment._ 6. Hard or friable limestone, sometimes sandy, full of _Carolia placunoides_, Cantr., and _Exogyra Fraasi_, also _Ostrea_ aff. _heteroclyta_, Defr., _Ostrea Reili_, Fraas., _O. elegans_, Desh., _Plicatula Bellardi_, May.-Eym., _Pectunculus (?) ægyptiacus_, Oppenh., _Qerunia_ (_Hydractinia_) _cornuta_, May.-Eym. 2 7. Purplish clays interbedded and remarkably current- bedded with ash-grey sands, with both ferruginous and highly carbonaceous bands with plant-remains, lignite and natural charcoal. Vertebrate remains fairly common, the mammalian including _Zeuglodon Osiris_, _Eosiren libyca_, Andr., _Mœritherium Lyonsi_, _Barytherium?_ Andr.; the reptilian _Stereogenys Cromeri_, Andr., and _Tomistoma africanum_, Andr., with numerous coprolites; also frequent remains of siluroid and other fish. Masses of coral, _Astrohelia similis_, Felix, in places 12 8. Hard grey, close-grained, concretionary sandstone, frequently weathering into huge elongated rounded masses; _Turritella pharaonica_, Cossm. Hard, purplish clays with grey sandy clays, sandrock, etc. Occasional crocodile and fish- remains 4 9. Hard ripple-marked sandstone. False-bedded sandstones with clay partings; ferruginous and lignitic bands with lumps of lignite. Occasionally coprolites and remains of Sirenia and Crocodilia are numerous 7 10. Hard or friable brown sandy limestone with shell- casts filled with scalenohedra of calcite. _Carolia placunoides_, _Turritella_ sp. ½ 11. Gypseous clays, with red ferruginous band; weathering to paper-shales below 4½ 12. Light-yellow limestone and calcareous sandstone with sharks’ teeth, _Mesalia fasciata_, Lam., _Cassidaria_ sp., _Rimella rimosa_, Sol., _Trachelochetus bituberculatus_, Cossm., _Turritella carinifera_, Desh., _T. Lessepsi_, May.-Eym., _Cardita fajumensis_, Oppenh. _Goniopora?_ 1 13. Slate-blue and brown gypseous clays with band containing _Mesalia_ sp., _Cassidaria nilotica_, Bell., _Exogyra Fraasi_ and _Goniaræa elegans_ 3 14. Sandstone and sandrock, light yellow 1